Antiskid tread for resilient tires.



H. T* HUGHES. NTISKI TREAT) FOR BESILIENT TIRES.

APPLIoMIoH FILED une, 1913.

lggsgg, Patented Mar. 2, 1915.

T @ZZ inkom it' 'muy concern,

Be it known that E.. Hij-nii T. ilionns, a citizen of tha TQniteil Siatos. residing at Youngstown. in tha county of Maho anti. State oi Ohio. nawI invented curtain new and useful niprox'oraents in ntisltiil Ti'eads for Resilient Tiros, of which tho iollowinff is a speciiication. i 1

This invention relates 'to the suogoct ot resilient tires tor vehicles, andL more. partionlarlv to tiros of this tvp@ which are nsnallykmployotl on the wheels oi' niotor .'oliicles, haring in view a novel and practicai improvement in tha traaii winistruotion for tires o this Character. I i

To this t., the primary object oi tho in s to gravide a traati mns-traction exfvrnal traction surh-.un i v4esilient or inoinnant tiro.

" i i tread construction is so designati Movida moans which wili oll'octuallj;

nt eil/:hiding oi' the Yohitlr wheel. while e suino tiino possossing' strengili ai .i

ConnootionA a special object. oi tho .iiiveithm is to provide an anthslml irc-ait @tion tot resilient Ytiras which sul s li; Coi us tho entire traction or runnino *infuse of the tir@I hotly. so as to prt:

i ininin Contact with tho anni.

' while it the saine tin'n Mnooilying iatuies which insure a "nin gripping eno-:garnant hetwoen the treuil anfl thi? grounil in surli a niannor as to {ircatli' iinproi'u tho traction i' i l Y l r i' any itnilu i sliiniiiing' objc-vis in View he romlily apparent to ihoso s' ino 'lf-tails oit tho invontooth tln sanu Consists n the noi'ei construction. coinhinatiou. anil rranfgeinaiit of parts' as liorainai'iur niort? uii tlesorilioil, illustratoil, anti oiaiinoii.

.yi-"nilo the. invention may ha susffoptililo oi ininoi Changers in th foi-in and amish-notion of pai-ts, a p1 fci" l cuiliothnient tiiereo llus'atto in the amont,-

anti-skid treaii Joins vnicles provi-iff in amori una@ n. Fig. i: fail in perspeo l i. hai. illustrating structural oharactoiisiivs of' oi of the lng units forming a part of tno tread. consti-nc4 mation of Letters Fatent.

.agoni'oti Mar. 2, MM5.

Serial No. 740.420.

tion. Fig. 23 is a rross seotional View on the lino :lA-: oi- Fig. 2.

liilw rolia-auw channtcrs designato ooriospoiuling: parts 'in thv siwrral ligurus oi' thv drawings.

ln carrying out the prvsvnt invention, no rhangif or altoratiou is reuuirwl in the goni-ral consti-union oi' thc tirix lioily. as the impr-muil anthsliiil trvail is applicable to any of thtx orilinari' inali'es of pinuxnatiry or rasiliifnt tiros. fwrorilingly. for illustrativa purposvs. the nuuwral i iivsiifnatts a tiro hotly or casing of' an .suitalile construction. thvy ouwr trmul portion 2 oi'wliii'li is construwtwl with a xnultiplivit)Y oi' oli'stantling' or 'aismi lug; units I), which aro preferably 'of ruhlwr aiul fori-.wil intvgrallif with ilul saiil outer tread portion oi" tho said tiro lioily.

'lho rais/.wl iup; units Il are of duplizate :unl inuwiriral construction, each of the sarna lli-ing' substantially of tln` sliap of tinl in ruri.x S. 'that is to sa', Cach of the. raised' lug units 33 has an olilong body 'formed with ih@ rounihii or circular onilsvl. aiul the o0n rawil sido walls which merge. on sigino'b lai linas` into tho curved walls ot' tho Circular ands l. thus providing a shape for the lug; units which ppi-mits a vary compact :1ssninlxlj.' or arrangan'icnt tlicroof upon the outer surface of thej tiro` body.

'This coiupait assembly or arrangement oi ug mits plainly shown in Fig. l i@ ilra\\'in;js anil consists in providing tine tiro lio/.ly with afplurality oi circum- Vl'oiwntiai'rows of si'nl units. with the lug` uniisy in nach i'ow long {itiuiinally aliiied, and tho lugV units in anija font rows disposed in stagiair-oil roiaion. iliocoriling to this arrangmuant oi the lug units in parallel ciriuiniorontial rows andA staggered trans\f'0rso rows. it wiil lio notwi that the iounilorl or virrular ont s i of the lingY units in the sain@r row inajiv ha disposed in quito oloso relation, and saiil roninhril or circular ands oiz the lug units in onf.x row will lio partly within the roncariai sirio portions 5 of the. lug;r units in adjatfont rows. so as to secure. the` close staggering, transversely, oi' the lug units7 as shown in the drawings. it is by reason of this parti-cular arrangement of the lug` units that a ironipart tread of maximum area is providod i'or the tiro body. Referring' furtluir to tho particular oonstruotion of the intiii'idnal lug units 5, each of the saine n.

provided at'both ends thereof with air pockets 6, forming what may be termed vacuum or suction cups for the ends of .the

lug body, while between the opposite suction cups, the body of each lug unit has formed on the outer side thereof a convexed bearing projection 7 which l, is preferably longitudinally ribbed to'produce transverse scallops or corrugations, as best seen in Figs. 2 and 3 of the drawings.

.By reason of the particular construction described, each lug unit necessarily has a suction gripping engagement with the pavement or ground, but the strain or pull incident of this suction effect is relieved by the pressure of the convexed bearing projection 7. 'Furthermore, the conveXed bearing projection 7 on account of its projection be- ,20 yond the body of the lugand itsrscalloped or corrugated form, materially contributes to the anti-skid characteristic of the tread surface, and in this connection it Will be noted that the scalloped or corrugated form of the bearing projection permits the latter to more easily and readily spread into a fiattened condition when engaging the ground,

thus adding to its eiciency in preventing' projection on its outer face between 'the saidy cups.

A tire body having its treadv cpniposed of a plurality of lug-units each having suc'- tion cups, and a convexed bearing projection formed between the said cups and projecting beyond the plane of theouterfffalce thereof, said rojection having a plurality of longitudina ribs. 1 f

In .testimony whereof I hereunto aflx my signature in the presence of two witnesses.

' HUGH T. HUGHES. Witnesses: l

AGNES A. JOHNSTON,

WM. BEIGHT. 

